How would I unwrap this?
Tutorials are outside the scope of this site. There are lots of good tutorials on YouTube. Just search for "Blender UV Mapping" or "UV unwrap" or "Blender mark seams" and you'll find lots of good information.

To avoid being pedantic, I'll try to give you some kind of answer.

Think of it like a papercraft TV or like you're unfolding a cardboard box. The things you should mark as seams are those places where you'd have two different edges coming together, instead of a fold. You could theoretically mark everything as a seam, and have lots of individual components to texture, but it's typically better to have as few separate pieces as you can manage. Or at least to separate it into pieces that make sense (glass, plastic, etc.).

I hope that at least gets you started.